1 /* QLogic qed NIC Driver 2 * 3 * Copyright (c) 2015 QLogic Corporation 4 * 5 * This software is available under the terms of the GNU General Public License 6 * (GPL) Version 2, available from the file COPYING in the main directory of 7 * this source tree. 8 */ 9 10 #include <linux/types.h> 11 #include <asm/byteorder.h> 12 #include <linux/dma-mapping.h> 13 #include <linux/if_vlan.h> 14 #include <linux/kernel.h> 15 #include <linux/pci.h> 16 #include <linux/slab.h> 17 #include <linux/stddef.h> 18 #include <linux/version.h> 19 #include <linux/workqueue.h> 20 #include <net/ipv6.h> 21 #include <linux/bitops.h> 22 #include <linux/delay.h> 23 #include <linux/errno.h> 24 #include <linux/etherdevice.h> 25 #include <linux/io.h> 26 #include <linux/list.h> 27 #include <linux/mutex.h> 28 #include <linux/spinlock.h> 29 #include <linux/string.h> 30 #include <linux/qed/qed_ll2_if.h> 31 #include "qed.h" 32 #include "qed_cxt.h" 33 #include "qed_dev_api.h" 34 #include "qed_hsi.h" 35 #include "qed_hw.h" 36 #include "qed_int.h" 37 #include "qed_ll2.h" 38 #include "qed_mcp.h" 39 #include "qed_reg_addr.h" 40 #include "qed_sp.h" 41 #include "qed_roce.h" 42 43 #define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred) 44 #define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred) 45 46 #define QED_LL2_TX_SIZE (256) 47 #define QED_LL2_RX_SIZE (4096) 48 49 struct qed_cb_ll2_info { 50 int rx_cnt; 51 u32 rx_size; 52 u8 handle; 53 bool frags_mapped; 54 55 /* Lock protecting LL2 buffer lists in sleepless context */ 56 spinlock_t lock; 57 struct list_head list; 58 59 const struct qed_ll2_cb_ops *cbs; 60 void *cb_cookie; 61 }; 62 63 struct qed_ll2_buffer { 64 struct list_head list; 65 void *data; 66 dma_addr_t phys_addr; 67 }; 68 69 static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn, 70 u8 connection_handle, 71 void *cookie, 72 dma_addr_t first_frag_addr, 73 bool b_last_fragment, 74 bool b_last_packet) 75 { 76 struct qed_dev *cdev = p_hwfn->cdev; 77 struct sk_buff *skb = cookie; 78 79 /* All we need to do is release the mapping */ 80 dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr, 81 skb_headlen(skb), DMA_TO_DEVICE); 82 83 if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb) 84 cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb, 85 b_last_fragment); 86 87 if (cdev->ll2->frags_mapped) 88 /* Case where mapped frags were received, need to 89 * free skb with nr_frags marked as 0 90 */ 91 skb_shinfo(skb)->nr_frags = 0; 92 93 dev_kfree_skb_any(skb); 94 } 95 96 static int qed_ll2_alloc_buffer(struct qed_dev *cdev, 97 u8 **data, dma_addr_t *phys_addr) 98 { 99 *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC); 100 if (!(*data)) { 101 DP_INFO(cdev, "Failed to allocate LL2 buffer data\n"); 102 return -ENOMEM; 103 } 104 105 *phys_addr = dma_map_single(&cdev->pdev->dev, 106 ((*data) + NET_SKB_PAD), 107 cdev->ll2->rx_size, DMA_FROM_DEVICE); 108 if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) { 109 DP_INFO(cdev, "Failed to map LL2 buffer data\n"); 110 kfree((*data)); 111 return -ENOMEM; 112 } 113 114 return 0; 115 } 116 117 static int qed_ll2_dealloc_buffer(struct qed_dev *cdev, 118 struct qed_ll2_buffer *buffer) 119 { 120 spin_lock_bh(&cdev->ll2->lock); 121 122 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 123 cdev->ll2->rx_size, DMA_FROM_DEVICE); 124 kfree(buffer->data); 125 list_del(&buffer->list); 126 127 cdev->ll2->rx_cnt--; 128 if (!cdev->ll2->rx_cnt) 129 DP_INFO(cdev, "All LL2 entries were removed\n"); 130 131 spin_unlock_bh(&cdev->ll2->lock); 132 133 return 0; 134 } 135 136 static void qed_ll2_kill_buffers(struct qed_dev *cdev) 137 { 138 struct qed_ll2_buffer *buffer, *tmp_buffer; 139 140 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) 141 qed_ll2_dealloc_buffer(cdev, buffer); 142 } 143 144 static void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn, 145 u8 connection_handle, 146 struct qed_ll2_rx_packet *p_pkt, 147 struct core_rx_fast_path_cqe *p_cqe, 148 bool b_last_packet) 149 { 150 u16 packet_length = le16_to_cpu(p_cqe->packet_length); 151 struct qed_ll2_buffer *buffer = p_pkt->cookie; 152 struct qed_dev *cdev = p_hwfn->cdev; 153 u16 vlan = le16_to_cpu(p_cqe->vlan); 154 u32 opaque_data_0, opaque_data_1; 155 u8 pad = p_cqe->placement_offset; 156 dma_addr_t new_phys_addr; 157 struct sk_buff *skb; 158 bool reuse = false; 159 int rc = -EINVAL; 160 u8 *new_data; 161 162 opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]); 163 opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]); 164 165 DP_VERBOSE(p_hwfn, 166 (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA), 167 "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n", 168 (u64)p_pkt->rx_buf_addr, pad, packet_length, 169 le16_to_cpu(p_cqe->parse_flags.flags), vlan, 170 opaque_data_0, opaque_data_1); 171 172 if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) { 173 print_hex_dump(KERN_INFO, "", 174 DUMP_PREFIX_OFFSET, 16, 1, 175 buffer->data, packet_length, false); 176 } 177 178 /* Determine if data is valid */ 179 if (packet_length < ETH_HLEN) 180 reuse = true; 181 182 /* Allocate a replacement for buffer; Reuse upon failure */ 183 if (!reuse) 184 rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data, 185 &new_phys_addr); 186 187 /* If need to reuse or there's no replacement buffer, repost this */ 188 if (rc) 189 goto out_post; 190 191 skb = build_skb(buffer->data, 0); 192 if (!skb) { 193 rc = -ENOMEM; 194 goto out_post; 195 } 196 197 pad += NET_SKB_PAD; 198 skb_reserve(skb, pad); 199 skb_put(skb, packet_length); 200 skb_checksum_none_assert(skb); 201 202 /* Get parital ethernet information instead of eth_type_trans(), 203 * Since we don't have an associated net_device. 204 */ 205 skb_reset_mac_header(skb); 206 skb->protocol = eth_hdr(skb)->h_proto; 207 208 /* Pass SKB onward */ 209 if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { 210 if (vlan) 211 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); 212 cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, 213 opaque_data_0, opaque_data_1); 214 } 215 216 /* Update Buffer information and update FW producer */ 217 buffer->data = new_data; 218 buffer->phys_addr = new_phys_addr; 219 220 out_post: 221 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle, 222 buffer->phys_addr, 0, buffer, 1); 223 224 if (rc) 225 qed_ll2_dealloc_buffer(cdev, buffer); 226 } 227 228 static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 229 u8 connection_handle, 230 bool b_lock, 231 bool b_only_active) 232 { 233 struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; 234 235 if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) 236 return NULL; 237 238 if (!p_hwfn->p_ll2_info) 239 return NULL; 240 241 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 242 243 if (b_only_active) { 244 if (b_lock) 245 mutex_lock(&p_ll2_conn->mutex); 246 if (p_ll2_conn->b_active) 247 p_ret = p_ll2_conn; 248 if (b_lock) 249 mutex_unlock(&p_ll2_conn->mutex); 250 } else { 251 p_ret = p_ll2_conn; 252 } 253 254 return p_ret; 255 } 256 257 static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, 258 u8 connection_handle) 259 { 260 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); 261 } 262 263 static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, 264 u8 connection_handle) 265 { 266 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); 267 } 268 269 static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn 270 *p_hwfn, 271 u8 connection_handle) 272 { 273 return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); 274 } 275 276 static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 277 { 278 bool b_last_packet = false, b_last_frag = false; 279 struct qed_ll2_tx_packet *p_pkt = NULL; 280 struct qed_ll2_info *p_ll2_conn; 281 struct qed_ll2_tx_queue *p_tx; 282 dma_addr_t tx_frag; 283 284 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 285 if (!p_ll2_conn) 286 return; 287 288 p_tx = &p_ll2_conn->tx_queue; 289 290 while (!list_empty(&p_tx->active_descq)) { 291 p_pkt = list_first_entry(&p_tx->active_descq, 292 struct qed_ll2_tx_packet, list_entry); 293 if (!p_pkt) 294 break; 295 296 list_del(&p_pkt->list_entry); 297 b_last_packet = list_empty(&p_tx->active_descq); 298 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 299 p_tx->cur_completing_packet = *p_pkt; 300 p_tx->cur_completing_bd_idx = 1; 301 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; 302 tx_frag = p_pkt->bds_set[0].tx_frag; 303 if (p_ll2_conn->gsi_enable) 304 qed_ll2b_release_tx_gsi_packet(p_hwfn, 305 p_ll2_conn->my_id, 306 p_pkt->cookie, 307 tx_frag, 308 b_last_frag, 309 b_last_packet); 310 else 311 qed_ll2b_complete_tx_packet(p_hwfn, 312 p_ll2_conn->my_id, 313 p_pkt->cookie, 314 tx_frag, 315 b_last_frag, 316 b_last_packet); 317 318 } 319 } 320 321 static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) 322 { 323 struct qed_ll2_info *p_ll2_conn = p_cookie; 324 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 325 u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; 326 struct qed_ll2_tx_packet *p_pkt; 327 bool b_last_frag = false; 328 unsigned long flags; 329 dma_addr_t tx_frag; 330 int rc = -EINVAL; 331 332 spin_lock_irqsave(&p_tx->lock, flags); 333 if (p_tx->b_completing_packet) { 334 rc = -EBUSY; 335 goto out; 336 } 337 338 new_idx = le16_to_cpu(*p_tx->p_fw_cons); 339 num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); 340 while (num_bds) { 341 if (list_empty(&p_tx->active_descq)) 342 goto out; 343 344 p_pkt = list_first_entry(&p_tx->active_descq, 345 struct qed_ll2_tx_packet, list_entry); 346 if (!p_pkt) 347 goto out; 348 349 p_tx->b_completing_packet = true; 350 p_tx->cur_completing_packet = *p_pkt; 351 num_bds_in_packet = p_pkt->bd_used; 352 list_del(&p_pkt->list_entry); 353 354 if (num_bds < num_bds_in_packet) { 355 DP_NOTICE(p_hwfn, 356 "Rest of BDs does not cover whole packet\n"); 357 goto out; 358 } 359 360 num_bds -= num_bds_in_packet; 361 p_tx->bds_idx += num_bds_in_packet; 362 while (num_bds_in_packet--) 363 qed_chain_consume(&p_tx->txq_chain); 364 365 p_tx->cur_completing_bd_idx = 1; 366 b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; 367 list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); 368 369 spin_unlock_irqrestore(&p_tx->lock, flags); 370 tx_frag = p_pkt->bds_set[0].tx_frag; 371 if (p_ll2_conn->gsi_enable) 372 qed_ll2b_complete_tx_gsi_packet(p_hwfn, 373 p_ll2_conn->my_id, 374 p_pkt->cookie, 375 tx_frag, 376 b_last_frag, !num_bds); 377 else 378 qed_ll2b_complete_tx_packet(p_hwfn, 379 p_ll2_conn->my_id, 380 p_pkt->cookie, 381 tx_frag, 382 b_last_frag, !num_bds); 383 spin_lock_irqsave(&p_tx->lock, flags); 384 } 385 386 p_tx->b_completing_packet = false; 387 rc = 0; 388 out: 389 spin_unlock_irqrestore(&p_tx->lock, flags); 390 return rc; 391 } 392 393 static int 394 qed_ll2_rxq_completion_gsi(struct qed_hwfn *p_hwfn, 395 struct qed_ll2_info *p_ll2_info, 396 union core_rx_cqe_union *p_cqe, 397 unsigned long lock_flags, bool b_last_cqe) 398 { 399 struct qed_ll2_rx_queue *p_rx = &p_ll2_info->rx_queue; 400 struct qed_ll2_rx_packet *p_pkt = NULL; 401 u16 packet_length, parse_flags, vlan; 402 u32 src_mac_addrhi; 403 u16 src_mac_addrlo; 404 405 if (!list_empty(&p_rx->active_descq)) 406 p_pkt = list_first_entry(&p_rx->active_descq, 407 struct qed_ll2_rx_packet, list_entry); 408 if (!p_pkt) { 409 DP_NOTICE(p_hwfn, 410 "GSI Rx completion but active_descq is empty\n"); 411 return -EIO; 412 } 413 414 list_del(&p_pkt->list_entry); 415 parse_flags = le16_to_cpu(p_cqe->rx_cqe_gsi.parse_flags.flags); 416 packet_length = le16_to_cpu(p_cqe->rx_cqe_gsi.data_length); 417 vlan = le16_to_cpu(p_cqe->rx_cqe_gsi.vlan); 418 src_mac_addrhi = le32_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrhi); 419 src_mac_addrlo = le16_to_cpu(p_cqe->rx_cqe_gsi.src_mac_addrlo); 420 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 421 DP_NOTICE(p_hwfn, 422 "Mismatch between active_descq and the LL2 Rx chain\n"); 423 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 424 425 spin_unlock_irqrestore(&p_rx->lock, lock_flags); 426 qed_ll2b_complete_rx_gsi_packet(p_hwfn, 427 p_ll2_info->my_id, 428 p_pkt->cookie, 429 p_pkt->rx_buf_addr, 430 packet_length, 431 p_cqe->rx_cqe_gsi.data_length_error, 432 parse_flags, 433 vlan, 434 src_mac_addrhi, 435 src_mac_addrlo, b_last_cqe); 436 spin_lock_irqsave(&p_rx->lock, lock_flags); 437 438 return 0; 439 } 440 441 static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn, 442 struct qed_ll2_info *p_ll2_conn, 443 union core_rx_cqe_union *p_cqe, 444 unsigned long lock_flags, 445 bool b_last_cqe) 446 { 447 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 448 struct qed_ll2_rx_packet *p_pkt = NULL; 449 450 if (!list_empty(&p_rx->active_descq)) 451 p_pkt = list_first_entry(&p_rx->active_descq, 452 struct qed_ll2_rx_packet, list_entry); 453 if (!p_pkt) { 454 DP_NOTICE(p_hwfn, 455 "LL2 Rx completion but active_descq is empty\n"); 456 return -EIO; 457 } 458 list_del(&p_pkt->list_entry); 459 460 if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) 461 DP_NOTICE(p_hwfn, 462 "Mismatch between active_descq and the LL2 Rx chain\n"); 463 list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); 464 465 spin_unlock_irqrestore(&p_rx->lock, lock_flags); 466 qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id, 467 p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe); 468 spin_lock_irqsave(&p_rx->lock, lock_flags); 469 470 return 0; 471 } 472 473 static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) 474 { 475 struct qed_ll2_info *p_ll2_conn = cookie; 476 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 477 union core_rx_cqe_union *cqe = NULL; 478 u16 cq_new_idx = 0, cq_old_idx = 0; 479 unsigned long flags = 0; 480 int rc = 0; 481 482 spin_lock_irqsave(&p_rx->lock, flags); 483 cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); 484 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 485 486 while (cq_new_idx != cq_old_idx) { 487 bool b_last_cqe = (cq_new_idx == cq_old_idx); 488 489 cqe = qed_chain_consume(&p_rx->rcq_chain); 490 cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); 491 492 DP_VERBOSE(p_hwfn, 493 QED_MSG_LL2, 494 "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", 495 cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); 496 497 switch (cqe->rx_cqe_sp.type) { 498 case CORE_RX_CQE_TYPE_SLOW_PATH: 499 DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n"); 500 rc = -EINVAL; 501 break; 502 case CORE_RX_CQE_TYPE_GSI_OFFLOAD: 503 rc = qed_ll2_rxq_completion_gsi(p_hwfn, p_ll2_conn, 504 cqe, flags, b_last_cqe); 505 break; 506 case CORE_RX_CQE_TYPE_REGULAR: 507 rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn, 508 cqe, flags, b_last_cqe); 509 break; 510 default: 511 rc = -EIO; 512 } 513 } 514 515 spin_unlock_irqrestore(&p_rx->lock, flags); 516 return rc; 517 } 518 519 static void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) 520 { 521 struct qed_ll2_info *p_ll2_conn = NULL; 522 struct qed_ll2_rx_packet *p_pkt = NULL; 523 struct qed_ll2_rx_queue *p_rx; 524 525 p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); 526 if (!p_ll2_conn) 527 return; 528 529 p_rx = &p_ll2_conn->rx_queue; 530 531 while (!list_empty(&p_rx->active_descq)) { 532 dma_addr_t rx_buf_addr; 533 void *cookie; 534 bool b_last; 535 536 p_pkt = list_first_entry(&p_rx->active_descq, 537 struct qed_ll2_rx_packet, list_entry); 538 if (!p_pkt) 539 break; 540 541 list_move_tail(&p_pkt->list_entry, &p_rx->free_descq); 542 543 rx_buf_addr = p_pkt->rx_buf_addr; 544 cookie = p_pkt->cookie; 545 546 b_last = list_empty(&p_rx->active_descq); 547 } 548 } 549 550 static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, 551 struct qed_ll2_info *p_ll2_conn, 552 u8 action_on_error) 553 { 554 enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type; 555 struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; 556 struct core_rx_start_ramrod_data *p_ramrod = NULL; 557 struct qed_spq_entry *p_ent = NULL; 558 struct qed_sp_init_data init_data; 559 u16 cqe_pbl_size; 560 int rc = 0; 561 562 /* Get SPQ entry */ 563 memset(&init_data, 0, sizeof(init_data)); 564 init_data.cid = p_ll2_conn->cid; 565 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 566 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 567 568 rc = qed_sp_init_request(p_hwfn, &p_ent, 569 CORE_RAMROD_RX_QUEUE_START, 570 PROTOCOLID_CORE, &init_data); 571 if (rc) 572 return rc; 573 574 p_ramrod = &p_ent->ramrod.core_rx_queue_start; 575 576 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 577 p_ramrod->sb_index = p_rx->rx_sb_index; 578 p_ramrod->complete_event_flg = 1; 579 580 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu); 581 DMA_REGPAIR_LE(p_ramrod->bd_base, 582 p_rx->rxq_chain.p_phys_addr); 583 cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); 584 p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); 585 DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, 586 qed_chain_get_pbl_phys(&p_rx->rcq_chain)); 587 588 p_ramrod->drop_ttl0_flg = p_ll2_conn->rx_drop_ttl0_flg; 589 p_ramrod->inner_vlan_removal_en = p_ll2_conn->rx_vlan_removal_en; 590 p_ramrod->queue_id = p_ll2_conn->queue_id; 591 p_ramrod->main_func_queue = 1; 592 593 if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) && 594 p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) { 595 p_ramrod->mf_si_bcast_accept_all = 1; 596 p_ramrod->mf_si_mcast_accept_all = 1; 597 } else { 598 p_ramrod->mf_si_bcast_accept_all = 0; 599 p_ramrod->mf_si_mcast_accept_all = 0; 600 } 601 602 p_ramrod->action_on_error.error_type = action_on_error; 603 p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable; 604 return qed_spq_post(p_hwfn, p_ent, NULL); 605 } 606 607 static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, 608 struct qed_ll2_info *p_ll2_conn) 609 { 610 enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type; 611 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 612 struct core_tx_start_ramrod_data *p_ramrod = NULL; 613 struct qed_spq_entry *p_ent = NULL; 614 struct qed_sp_init_data init_data; 615 union qed_qm_pq_params pq_params; 616 u16 pq_id = 0, pbl_size; 617 int rc = -EINVAL; 618 619 if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) 620 return 0; 621 622 /* Get SPQ entry */ 623 memset(&init_data, 0, sizeof(init_data)); 624 init_data.cid = p_ll2_conn->cid; 625 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 626 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 627 628 rc = qed_sp_init_request(p_hwfn, &p_ent, 629 CORE_RAMROD_TX_QUEUE_START, 630 PROTOCOLID_CORE, &init_data); 631 if (rc) 632 return rc; 633 634 p_ramrod = &p_ent->ramrod.core_tx_queue_start; 635 636 p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); 637 p_ramrod->sb_index = p_tx->tx_sb_index; 638 p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu); 639 p_ll2_conn->tx_stats_en = 1; 640 p_ramrod->stats_en = p_ll2_conn->tx_stats_en; 641 p_ramrod->stats_id = p_ll2_conn->tx_stats_id; 642 643 DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, 644 qed_chain_get_pbl_phys(&p_tx->txq_chain)); 645 pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); 646 p_ramrod->pbl_size = cpu_to_le16(pbl_size); 647 648 memset(&pq_params, 0, sizeof(pq_params)); 649 pq_params.core.tc = p_ll2_conn->tx_tc; 650 pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); 651 p_ramrod->qm_pq_id = cpu_to_le16(pq_id); 652 653 switch (conn_type) { 654 case QED_LL2_TYPE_ISCSI: 655 case QED_LL2_TYPE_ISCSI_OOO: 656 p_ramrod->conn_type = PROTOCOLID_ISCSI; 657 break; 658 case QED_LL2_TYPE_ROCE: 659 p_ramrod->conn_type = PROTOCOLID_ROCE; 660 break; 661 default: 662 p_ramrod->conn_type = PROTOCOLID_ETH; 663 DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); 664 } 665 666 p_ramrod->gsi_offload_flag = p_ll2_conn->gsi_enable; 667 return qed_spq_post(p_hwfn, p_ent, NULL); 668 } 669 670 static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, 671 struct qed_ll2_info *p_ll2_conn) 672 { 673 struct core_rx_stop_ramrod_data *p_ramrod = NULL; 674 struct qed_spq_entry *p_ent = NULL; 675 struct qed_sp_init_data init_data; 676 int rc = -EINVAL; 677 678 /* Get SPQ entry */ 679 memset(&init_data, 0, sizeof(init_data)); 680 init_data.cid = p_ll2_conn->cid; 681 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 682 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 683 684 rc = qed_sp_init_request(p_hwfn, &p_ent, 685 CORE_RAMROD_RX_QUEUE_STOP, 686 PROTOCOLID_CORE, &init_data); 687 if (rc) 688 return rc; 689 690 p_ramrod = &p_ent->ramrod.core_rx_queue_stop; 691 692 p_ramrod->complete_event_flg = 1; 693 p_ramrod->queue_id = p_ll2_conn->queue_id; 694 695 return qed_spq_post(p_hwfn, p_ent, NULL); 696 } 697 698 static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, 699 struct qed_ll2_info *p_ll2_conn) 700 { 701 struct qed_spq_entry *p_ent = NULL; 702 struct qed_sp_init_data init_data; 703 int rc = -EINVAL; 704 705 /* Get SPQ entry */ 706 memset(&init_data, 0, sizeof(init_data)); 707 init_data.cid = p_ll2_conn->cid; 708 init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; 709 init_data.comp_mode = QED_SPQ_MODE_EBLOCK; 710 711 rc = qed_sp_init_request(p_hwfn, &p_ent, 712 CORE_RAMROD_TX_QUEUE_STOP, 713 PROTOCOLID_CORE, &init_data); 714 if (rc) 715 return rc; 716 717 return qed_spq_post(p_hwfn, p_ent, NULL); 718 } 719 720 static int 721 qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, 722 struct qed_ll2_info *p_ll2_info, u16 rx_num_desc) 723 { 724 struct qed_ll2_rx_packet *p_descq; 725 u32 capacity; 726 int rc = 0; 727 728 if (!rx_num_desc) 729 goto out; 730 731 rc = qed_chain_alloc(p_hwfn->cdev, 732 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 733 QED_CHAIN_MODE_NEXT_PTR, 734 QED_CHAIN_CNT_TYPE_U16, 735 rx_num_desc, 736 sizeof(struct core_rx_bd), 737 &p_ll2_info->rx_queue.rxq_chain); 738 if (rc) { 739 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); 740 goto out; 741 } 742 743 capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); 744 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), 745 GFP_KERNEL); 746 if (!p_descq) { 747 rc = -ENOMEM; 748 DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); 749 goto out; 750 } 751 p_ll2_info->rx_queue.descq_array = p_descq; 752 753 rc = qed_chain_alloc(p_hwfn->cdev, 754 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 755 QED_CHAIN_MODE_PBL, 756 QED_CHAIN_CNT_TYPE_U16, 757 rx_num_desc, 758 sizeof(struct core_rx_fast_path_cqe), 759 &p_ll2_info->rx_queue.rcq_chain); 760 if (rc) { 761 DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); 762 goto out; 763 } 764 765 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 766 "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", 767 p_ll2_info->conn_type, rx_num_desc); 768 769 out: 770 return rc; 771 } 772 773 static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, 774 struct qed_ll2_info *p_ll2_info, 775 u16 tx_num_desc) 776 { 777 struct qed_ll2_tx_packet *p_descq; 778 u32 capacity; 779 int rc = 0; 780 781 if (!tx_num_desc) 782 goto out; 783 784 rc = qed_chain_alloc(p_hwfn->cdev, 785 QED_CHAIN_USE_TO_CONSUME_PRODUCE, 786 QED_CHAIN_MODE_PBL, 787 QED_CHAIN_CNT_TYPE_U16, 788 tx_num_desc, 789 sizeof(struct core_tx_bd), 790 &p_ll2_info->tx_queue.txq_chain); 791 if (rc) 792 goto out; 793 794 capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); 795 p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet), 796 GFP_KERNEL); 797 if (!p_descq) { 798 rc = -ENOMEM; 799 goto out; 800 } 801 p_ll2_info->tx_queue.descq_array = p_descq; 802 803 DP_VERBOSE(p_hwfn, QED_MSG_LL2, 804 "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", 805 p_ll2_info->conn_type, tx_num_desc); 806 807 out: 808 if (rc) 809 DP_NOTICE(p_hwfn, 810 "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", 811 tx_num_desc); 812 return rc; 813 } 814 815 int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn, 816 struct qed_ll2_info *p_params, 817 u16 rx_num_desc, 818 u16 tx_num_desc, 819 u8 *p_connection_handle) 820 { 821 qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; 822 struct qed_ll2_info *p_ll2_info = NULL; 823 int rc; 824 u8 i; 825 826 if (!p_connection_handle || !p_hwfn->p_ll2_info) 827 return -EINVAL; 828 829 /* Find a free connection to be used */ 830 for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) { 831 mutex_lock(&p_hwfn->p_ll2_info[i].mutex); 832 if (p_hwfn->p_ll2_info[i].b_active) { 833 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 834 continue; 835 } 836 837 p_hwfn->p_ll2_info[i].b_active = true; 838 p_ll2_info = &p_hwfn->p_ll2_info[i]; 839 mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); 840 break; 841 } 842 if (!p_ll2_info) 843 return -EBUSY; 844 845 p_ll2_info->conn_type = p_params->conn_type; 846 p_ll2_info->mtu = p_params->mtu; 847 p_ll2_info->rx_drop_ttl0_flg = p_params->rx_drop_ttl0_flg; 848 p_ll2_info->rx_vlan_removal_en = p_params->rx_vlan_removal_en; 849 p_ll2_info->tx_tc = p_params->tx_tc; 850 p_ll2_info->tx_dest = p_params->tx_dest; 851 p_ll2_info->ai_err_packet_too_big = p_params->ai_err_packet_too_big; 852 p_ll2_info->ai_err_no_buf = p_params->ai_err_no_buf; 853 p_ll2_info->gsi_enable = p_params->gsi_enable; 854 855 rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info, rx_num_desc); 856 if (rc) 857 goto q_allocate_fail; 858 859 rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info, tx_num_desc); 860 if (rc) 861 goto q_allocate_fail; 862 863 /* Register callbacks for the Rx/Tx queues */ 864 comp_rx_cb = qed_ll2_rxq_completion; 865 comp_tx_cb = qed_ll2_txq_completion; 866 867 if (rx_num_desc) { 868 qed_int_register_cb(p_hwfn, comp_rx_cb, 869 &p_hwfn->p_ll2_info[i], 870 &p_ll2_info->rx_queue.rx_sb_index, 871 &p_ll2_info->rx_queue.p_fw_cons); 872 p_ll2_info->rx_queue.b_cb_registred = true; 873 } 874 875 if (tx_num_desc) { 876 qed_int_register_cb(p_hwfn, 877 comp_tx_cb, 878 &p_hwfn->p_ll2_info[i], 879 &p_ll2_info->tx_queue.tx_sb_index, 880 &p_ll2_info->tx_queue.p_fw_cons); 881 p_ll2_info->tx_queue.b_cb_registred = true; 882 } 883 884 *p_connection_handle = i; 885 return rc; 886 887 q_allocate_fail: 888 qed_ll2_release_connection(p_hwfn, i); 889 return -ENOMEM; 890 } 891 892 static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, 893 struct qed_ll2_info *p_ll2_conn) 894 { 895 u8 action_on_error = 0; 896 897 if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) 898 return 0; 899 900 DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); 901 902 SET_FIELD(action_on_error, 903 CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, 904 p_ll2_conn->ai_err_packet_too_big); 905 SET_FIELD(action_on_error, 906 CORE_RX_ACTION_ON_ERROR_NO_BUFF, p_ll2_conn->ai_err_no_buf); 907 908 return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); 909 } 910 911 int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 912 { 913 struct qed_ll2_info *p_ll2_conn; 914 struct qed_ll2_rx_queue *p_rx; 915 struct qed_ll2_tx_queue *p_tx; 916 int rc = -EINVAL; 917 u32 i, capacity; 918 u8 qid; 919 920 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 921 if (!p_ll2_conn) 922 return -EINVAL; 923 p_rx = &p_ll2_conn->rx_queue; 924 p_tx = &p_ll2_conn->tx_queue; 925 926 qed_chain_reset(&p_rx->rxq_chain); 927 qed_chain_reset(&p_rx->rcq_chain); 928 INIT_LIST_HEAD(&p_rx->active_descq); 929 INIT_LIST_HEAD(&p_rx->free_descq); 930 INIT_LIST_HEAD(&p_rx->posting_descq); 931 spin_lock_init(&p_rx->lock); 932 capacity = qed_chain_get_capacity(&p_rx->rxq_chain); 933 for (i = 0; i < capacity; i++) 934 list_add_tail(&p_rx->descq_array[i].list_entry, 935 &p_rx->free_descq); 936 *p_rx->p_fw_cons = 0; 937 938 qed_chain_reset(&p_tx->txq_chain); 939 INIT_LIST_HEAD(&p_tx->active_descq); 940 INIT_LIST_HEAD(&p_tx->free_descq); 941 INIT_LIST_HEAD(&p_tx->sending_descq); 942 spin_lock_init(&p_tx->lock); 943 capacity = qed_chain_get_capacity(&p_tx->txq_chain); 944 for (i = 0; i < capacity; i++) 945 list_add_tail(&p_tx->descq_array[i].list_entry, 946 &p_tx->free_descq); 947 p_tx->cur_completing_bd_idx = 0; 948 p_tx->bds_idx = 0; 949 p_tx->b_completing_packet = false; 950 p_tx->cur_send_packet = NULL; 951 p_tx->cur_send_frag_num = 0; 952 p_tx->cur_completing_frag_num = 0; 953 *p_tx->p_fw_cons = 0; 954 955 qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); 956 957 qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle; 958 p_ll2_conn->queue_id = qid; 959 p_ll2_conn->tx_stats_id = qid; 960 p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + 961 GTT_BAR0_MAP_REG_TSDM_RAM + 962 TSTORM_LL2_RX_PRODS_OFFSET(qid); 963 p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + 964 qed_db_addr(p_ll2_conn->cid, 965 DQ_DEMS_LEGACY); 966 967 rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); 968 if (rc) 969 return rc; 970 971 rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); 972 if (rc) 973 return rc; 974 975 if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE) 976 qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1); 977 978 return rc; 979 } 980 981 static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, 982 struct qed_ll2_rx_queue *p_rx, 983 struct qed_ll2_rx_packet *p_curp) 984 { 985 struct qed_ll2_rx_packet *p_posting_packet = NULL; 986 struct core_ll2_rx_prod rx_prod = { 0, 0, 0 }; 987 bool b_notify_fw = false; 988 u16 bd_prod, cq_prod; 989 990 /* This handles the flushing of already posted buffers */ 991 while (!list_empty(&p_rx->posting_descq)) { 992 p_posting_packet = list_first_entry(&p_rx->posting_descq, 993 struct qed_ll2_rx_packet, 994 list_entry); 995 list_move_tail(&p_posting_packet->list_entry, 996 &p_rx->active_descq); 997 b_notify_fw = true; 998 } 999 1000 /* This handles the supplied packet [if there is one] */ 1001 if (p_curp) { 1002 list_add_tail(&p_curp->list_entry, &p_rx->active_descq); 1003 b_notify_fw = true; 1004 } 1005 1006 if (!b_notify_fw) 1007 return; 1008 1009 bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); 1010 cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); 1011 rx_prod.bd_prod = cpu_to_le16(bd_prod); 1012 rx_prod.cqe_prod = cpu_to_le16(cq_prod); 1013 DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); 1014 } 1015 1016 int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn, 1017 u8 connection_handle, 1018 dma_addr_t addr, 1019 u16 buf_len, void *cookie, u8 notify_fw) 1020 { 1021 struct core_rx_bd_with_buff_len *p_curb = NULL; 1022 struct qed_ll2_rx_packet *p_curp = NULL; 1023 struct qed_ll2_info *p_ll2_conn; 1024 struct qed_ll2_rx_queue *p_rx; 1025 unsigned long flags; 1026 void *p_data; 1027 int rc = 0; 1028 1029 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1030 if (!p_ll2_conn) 1031 return -EINVAL; 1032 p_rx = &p_ll2_conn->rx_queue; 1033 1034 spin_lock_irqsave(&p_rx->lock, flags); 1035 if (!list_empty(&p_rx->free_descq)) 1036 p_curp = list_first_entry(&p_rx->free_descq, 1037 struct qed_ll2_rx_packet, list_entry); 1038 if (p_curp) { 1039 if (qed_chain_get_elem_left(&p_rx->rxq_chain) && 1040 qed_chain_get_elem_left(&p_rx->rcq_chain)) { 1041 p_data = qed_chain_produce(&p_rx->rxq_chain); 1042 p_curb = (struct core_rx_bd_with_buff_len *)p_data; 1043 qed_chain_produce(&p_rx->rcq_chain); 1044 } 1045 } 1046 1047 /* If we're lacking entires, let's try to flush buffers to FW */ 1048 if (!p_curp || !p_curb) { 1049 rc = -EBUSY; 1050 p_curp = NULL; 1051 goto out_notify; 1052 } 1053 1054 /* We have an Rx packet we can fill */ 1055 DMA_REGPAIR_LE(p_curb->addr, addr); 1056 p_curb->buff_length = cpu_to_le16(buf_len); 1057 p_curp->rx_buf_addr = addr; 1058 p_curp->cookie = cookie; 1059 p_curp->rxq_bd = p_curb; 1060 p_curp->buf_length = buf_len; 1061 list_del(&p_curp->list_entry); 1062 1063 /* Check if we only want to enqueue this packet without informing FW */ 1064 if (!notify_fw) { 1065 list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); 1066 goto out; 1067 } 1068 1069 out_notify: 1070 qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); 1071 out: 1072 spin_unlock_irqrestore(&p_rx->lock, flags); 1073 return rc; 1074 } 1075 1076 static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, 1077 struct qed_ll2_tx_queue *p_tx, 1078 struct qed_ll2_tx_packet *p_curp, 1079 u8 num_of_bds, 1080 dma_addr_t first_frag, 1081 u16 first_frag_len, void *p_cookie, 1082 u8 notify_fw) 1083 { 1084 list_del(&p_curp->list_entry); 1085 p_curp->cookie = p_cookie; 1086 p_curp->bd_used = num_of_bds; 1087 p_curp->notify_fw = notify_fw; 1088 p_tx->cur_send_packet = p_curp; 1089 p_tx->cur_send_frag_num = 0; 1090 1091 p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag; 1092 p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len; 1093 p_tx->cur_send_frag_num++; 1094 } 1095 1096 static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, 1097 struct qed_ll2_info *p_ll2, 1098 struct qed_ll2_tx_packet *p_curp, 1099 u8 num_of_bds, 1100 enum core_tx_dest tx_dest, 1101 u16 vlan, 1102 u8 bd_flags, 1103 u16 l4_hdr_offset_w, 1104 enum core_roce_flavor_type type, 1105 dma_addr_t first_frag, 1106 u16 first_frag_len) 1107 { 1108 struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; 1109 u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); 1110 struct core_tx_bd *start_bd = NULL; 1111 u16 frag_idx; 1112 1113 start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1114 start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan); 1115 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, 1116 cpu_to_le16(l4_hdr_offset_w)); 1117 SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest); 1118 start_bd->bd_flags.as_bitfield = bd_flags; 1119 start_bd->bd_flags.as_bitfield |= CORE_TX_BD_FLAGS_START_BD_MASK << 1120 CORE_TX_BD_FLAGS_START_BD_SHIFT; 1121 SET_FIELD(start_bd->bitfield0, CORE_TX_BD_NBDS, num_of_bds); 1122 DMA_REGPAIR_LE(start_bd->addr, first_frag); 1123 start_bd->nbytes = cpu_to_le16(first_frag_len); 1124 1125 DP_VERBOSE(p_hwfn, 1126 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1127 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n", 1128 p_ll2->queue_id, 1129 p_ll2->cid, 1130 p_ll2->conn_type, 1131 prod_idx, 1132 first_frag_len, 1133 num_of_bds, 1134 le32_to_cpu(start_bd->addr.hi), 1135 le32_to_cpu(start_bd->addr.lo)); 1136 1137 if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds) 1138 return; 1139 1140 /* Need to provide the packet with additional BDs for frags */ 1141 for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; 1142 frag_idx < num_of_bds; frag_idx++) { 1143 struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; 1144 1145 *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); 1146 (*p_bd)->bd_flags.as_bitfield = 0; 1147 (*p_bd)->bitfield1 = 0; 1148 (*p_bd)->bitfield0 = 0; 1149 p_curp->bds_set[frag_idx].tx_frag = 0; 1150 p_curp->bds_set[frag_idx].frag_len = 0; 1151 } 1152 } 1153 1154 /* This should be called while the Txq spinlock is being held */ 1155 static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, 1156 struct qed_ll2_info *p_ll2_conn) 1157 { 1158 bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; 1159 struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; 1160 struct qed_ll2_tx_packet *p_pkt = NULL; 1161 struct core_db_data db_msg = { 0, 0, 0 }; 1162 u16 bd_prod; 1163 1164 /* If there are missing BDs, don't do anything now */ 1165 if (p_ll2_conn->tx_queue.cur_send_frag_num != 1166 p_ll2_conn->tx_queue.cur_send_packet->bd_used) 1167 return; 1168 1169 /* Push the current packet to the list and clean after it */ 1170 list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, 1171 &p_ll2_conn->tx_queue.sending_descq); 1172 p_ll2_conn->tx_queue.cur_send_packet = NULL; 1173 p_ll2_conn->tx_queue.cur_send_frag_num = 0; 1174 1175 /* Notify FW of packet only if requested to */ 1176 if (!b_notify) 1177 return; 1178 1179 bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); 1180 1181 while (!list_empty(&p_tx->sending_descq)) { 1182 p_pkt = list_first_entry(&p_tx->sending_descq, 1183 struct qed_ll2_tx_packet, list_entry); 1184 if (!p_pkt) 1185 break; 1186 1187 list_move_tail(&p_pkt->list_entry, &p_tx->active_descq); 1188 } 1189 1190 SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); 1191 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); 1192 SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, 1193 DQ_XCM_CORE_TX_BD_PROD_CMD); 1194 db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; 1195 db_msg.spq_prod = cpu_to_le16(bd_prod); 1196 1197 /* Make sure the BDs data is updated before ringing the doorbell */ 1198 wmb(); 1199 1200 DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg)); 1201 1202 DP_VERBOSE(p_hwfn, 1203 (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), 1204 "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", 1205 p_ll2_conn->queue_id, 1206 p_ll2_conn->cid, p_ll2_conn->conn_type, db_msg.spq_prod); 1207 } 1208 1209 int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn, 1210 u8 connection_handle, 1211 u8 num_of_bds, 1212 u16 vlan, 1213 u8 bd_flags, 1214 u16 l4_hdr_offset_w, 1215 enum qed_ll2_roce_flavor_type qed_roce_flavor, 1216 dma_addr_t first_frag, 1217 u16 first_frag_len, void *cookie, u8 notify_fw) 1218 { 1219 struct qed_ll2_tx_packet *p_curp = NULL; 1220 struct qed_ll2_info *p_ll2_conn = NULL; 1221 enum core_roce_flavor_type roce_flavor; 1222 struct qed_ll2_tx_queue *p_tx; 1223 struct qed_chain *p_tx_chain; 1224 unsigned long flags; 1225 int rc = 0; 1226 1227 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1228 if (!p_ll2_conn) 1229 return -EINVAL; 1230 p_tx = &p_ll2_conn->tx_queue; 1231 p_tx_chain = &p_tx->txq_chain; 1232 1233 if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET) 1234 return -EIO; 1235 1236 spin_lock_irqsave(&p_tx->lock, flags); 1237 if (p_tx->cur_send_packet) { 1238 rc = -EEXIST; 1239 goto out; 1240 } 1241 1242 /* Get entry, but only if we have tx elements for it */ 1243 if (!list_empty(&p_tx->free_descq)) 1244 p_curp = list_first_entry(&p_tx->free_descq, 1245 struct qed_ll2_tx_packet, list_entry); 1246 if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds) 1247 p_curp = NULL; 1248 1249 if (!p_curp) { 1250 rc = -EBUSY; 1251 goto out; 1252 } 1253 1254 if (qed_roce_flavor == QED_LL2_ROCE) { 1255 roce_flavor = CORE_ROCE; 1256 } else if (qed_roce_flavor == QED_LL2_RROCE) { 1257 roce_flavor = CORE_RROCE; 1258 } else { 1259 rc = -EINVAL; 1260 goto out; 1261 } 1262 1263 /* Prepare packet and BD, and perhaps send a doorbell to FW */ 1264 qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, 1265 num_of_bds, first_frag, 1266 first_frag_len, cookie, notify_fw); 1267 qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, 1268 num_of_bds, CORE_TX_DEST_NW, 1269 vlan, bd_flags, l4_hdr_offset_w, 1270 roce_flavor, 1271 first_frag, first_frag_len); 1272 1273 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1274 1275 out: 1276 spin_unlock_irqrestore(&p_tx->lock, flags); 1277 return rc; 1278 } 1279 1280 int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn, 1281 u8 connection_handle, 1282 dma_addr_t addr, u16 nbytes) 1283 { 1284 struct qed_ll2_tx_packet *p_cur_send_packet = NULL; 1285 struct qed_ll2_info *p_ll2_conn = NULL; 1286 u16 cur_send_frag_num = 0; 1287 struct core_tx_bd *p_bd; 1288 unsigned long flags; 1289 1290 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1291 if (!p_ll2_conn) 1292 return -EINVAL; 1293 1294 if (!p_ll2_conn->tx_queue.cur_send_packet) 1295 return -EINVAL; 1296 1297 p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; 1298 cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; 1299 1300 if (cur_send_frag_num >= p_cur_send_packet->bd_used) 1301 return -EINVAL; 1302 1303 /* Fill the BD information, and possibly notify FW */ 1304 p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; 1305 DMA_REGPAIR_LE(p_bd->addr, addr); 1306 p_bd->nbytes = cpu_to_le16(nbytes); 1307 p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; 1308 p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; 1309 1310 p_ll2_conn->tx_queue.cur_send_frag_num++; 1311 1312 spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); 1313 qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); 1314 spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); 1315 1316 return 0; 1317 } 1318 1319 int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 1320 { 1321 struct qed_ll2_info *p_ll2_conn = NULL; 1322 int rc = -EINVAL; 1323 1324 p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); 1325 if (!p_ll2_conn) 1326 return -EINVAL; 1327 1328 /* Stop Tx & Rx of connection, if needed */ 1329 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1330 rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); 1331 if (rc) 1332 return rc; 1333 qed_ll2_txq_flush(p_hwfn, connection_handle); 1334 } 1335 1336 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1337 rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); 1338 if (rc) 1339 return rc; 1340 qed_ll2_rxq_flush(p_hwfn, connection_handle); 1341 } 1342 1343 return rc; 1344 } 1345 1346 void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) 1347 { 1348 struct qed_ll2_info *p_ll2_conn = NULL; 1349 1350 p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); 1351 if (!p_ll2_conn) 1352 return; 1353 1354 if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { 1355 p_ll2_conn->rx_queue.b_cb_registred = false; 1356 qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); 1357 } 1358 1359 if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { 1360 p_ll2_conn->tx_queue.b_cb_registred = false; 1361 qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); 1362 } 1363 1364 kfree(p_ll2_conn->tx_queue.descq_array); 1365 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); 1366 1367 kfree(p_ll2_conn->rx_queue.descq_array); 1368 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); 1369 qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); 1370 1371 qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); 1372 1373 mutex_lock(&p_ll2_conn->mutex); 1374 p_ll2_conn->b_active = false; 1375 mutex_unlock(&p_ll2_conn->mutex); 1376 } 1377 1378 struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn) 1379 { 1380 struct qed_ll2_info *p_ll2_connections; 1381 u8 i; 1382 1383 /* Allocate LL2's set struct */ 1384 p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, 1385 sizeof(struct qed_ll2_info), GFP_KERNEL); 1386 if (!p_ll2_connections) { 1387 DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); 1388 return NULL; 1389 } 1390 1391 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1392 p_ll2_connections[i].my_id = i; 1393 1394 return p_ll2_connections; 1395 } 1396 1397 void qed_ll2_setup(struct qed_hwfn *p_hwfn, 1398 struct qed_ll2_info *p_ll2_connections) 1399 { 1400 int i; 1401 1402 for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) 1403 mutex_init(&p_ll2_connections[i].mutex); 1404 } 1405 1406 void qed_ll2_free(struct qed_hwfn *p_hwfn, 1407 struct qed_ll2_info *p_ll2_connections) 1408 { 1409 kfree(p_ll2_connections); 1410 } 1411 1412 static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, 1413 struct qed_ptt *p_ptt, 1414 struct qed_ll2_info *p_ll2_conn, 1415 struct qed_ll2_stats *p_stats) 1416 { 1417 struct core_ll2_tstorm_per_queue_stat tstats; 1418 u8 qid = p_ll2_conn->queue_id; 1419 u32 tstats_addr; 1420 1421 memset(&tstats, 0, sizeof(tstats)); 1422 tstats_addr = BAR0_MAP_REG_TSDM_RAM + 1423 CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); 1424 qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); 1425 1426 p_stats->packet_too_big_discard = 1427 HILO_64_REGPAIR(tstats.packet_too_big_discard); 1428 p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard); 1429 } 1430 1431 static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, 1432 struct qed_ptt *p_ptt, 1433 struct qed_ll2_info *p_ll2_conn, 1434 struct qed_ll2_stats *p_stats) 1435 { 1436 struct core_ll2_ustorm_per_queue_stat ustats; 1437 u8 qid = p_ll2_conn->queue_id; 1438 u32 ustats_addr; 1439 1440 memset(&ustats, 0, sizeof(ustats)); 1441 ustats_addr = BAR0_MAP_REG_USDM_RAM + 1442 CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); 1443 qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); 1444 1445 p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes); 1446 p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes); 1447 p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes); 1448 p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts); 1449 p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts); 1450 p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts); 1451 } 1452 1453 static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, 1454 struct qed_ptt *p_ptt, 1455 struct qed_ll2_info *p_ll2_conn, 1456 struct qed_ll2_stats *p_stats) 1457 { 1458 struct core_ll2_pstorm_per_queue_stat pstats; 1459 u8 stats_id = p_ll2_conn->tx_stats_id; 1460 u32 pstats_addr; 1461 1462 memset(&pstats, 0, sizeof(pstats)); 1463 pstats_addr = BAR0_MAP_REG_PSDM_RAM + 1464 CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); 1465 qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); 1466 1467 p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes); 1468 p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes); 1469 p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes); 1470 p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts); 1471 p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts); 1472 p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts); 1473 } 1474 1475 int qed_ll2_get_stats(struct qed_hwfn *p_hwfn, 1476 u8 connection_handle, struct qed_ll2_stats *p_stats) 1477 { 1478 struct qed_ll2_info *p_ll2_conn = NULL; 1479 struct qed_ptt *p_ptt; 1480 1481 memset(p_stats, 0, sizeof(*p_stats)); 1482 1483 if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || 1484 !p_hwfn->p_ll2_info) 1485 return -EINVAL; 1486 1487 p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; 1488 1489 p_ptt = qed_ptt_acquire(p_hwfn); 1490 if (!p_ptt) { 1491 DP_ERR(p_hwfn, "Failed to acquire ptt\n"); 1492 return -EINVAL; 1493 } 1494 1495 _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 1496 _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 1497 if (p_ll2_conn->tx_stats_en) 1498 _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); 1499 1500 qed_ptt_release(p_hwfn, p_ptt); 1501 return 0; 1502 } 1503 1504 static void qed_ll2_register_cb_ops(struct qed_dev *cdev, 1505 const struct qed_ll2_cb_ops *ops, 1506 void *cookie) 1507 { 1508 cdev->ll2->cbs = ops; 1509 cdev->ll2->cb_cookie = cookie; 1510 } 1511 1512 static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) 1513 { 1514 struct qed_ll2_info ll2_info; 1515 struct qed_ll2_buffer *buffer, *tmp_buffer; 1516 enum qed_ll2_conn_type conn_type; 1517 struct qed_ptt *p_ptt; 1518 int rc, i; 1519 1520 /* Initialize LL2 locks & lists */ 1521 INIT_LIST_HEAD(&cdev->ll2->list); 1522 spin_lock_init(&cdev->ll2->lock); 1523 cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + 1524 L1_CACHE_BYTES + params->mtu; 1525 cdev->ll2->frags_mapped = params->frags_mapped; 1526 1527 /*Allocate memory for LL2 */ 1528 DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n", 1529 cdev->ll2->rx_size); 1530 for (i = 0; i < QED_LL2_RX_SIZE; i++) { 1531 buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); 1532 if (!buffer) { 1533 DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); 1534 goto fail; 1535 } 1536 1537 rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, 1538 &buffer->phys_addr); 1539 if (rc) { 1540 kfree(buffer); 1541 goto fail; 1542 } 1543 1544 list_add_tail(&buffer->list, &cdev->ll2->list); 1545 } 1546 1547 switch (QED_LEADING_HWFN(cdev)->hw_info.personality) { 1548 case QED_PCI_ISCSI: 1549 conn_type = QED_LL2_TYPE_ISCSI; 1550 break; 1551 case QED_PCI_ETH_ROCE: 1552 conn_type = QED_LL2_TYPE_ROCE; 1553 break; 1554 default: 1555 conn_type = QED_LL2_TYPE_TEST; 1556 } 1557 1558 /* Prepare the temporary ll2 information */ 1559 memset(&ll2_info, 0, sizeof(ll2_info)); 1560 ll2_info.conn_type = conn_type; 1561 ll2_info.mtu = params->mtu; 1562 ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets; 1563 ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping; 1564 ll2_info.tx_tc = 0; 1565 ll2_info.tx_dest = CORE_TX_DEST_NW; 1566 ll2_info.gsi_enable = 1; 1567 1568 rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info, 1569 QED_LL2_RX_SIZE, QED_LL2_TX_SIZE, 1570 &cdev->ll2->handle); 1571 if (rc) { 1572 DP_INFO(cdev, "Failed to acquire LL2 connection\n"); 1573 goto fail; 1574 } 1575 1576 rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev), 1577 cdev->ll2->handle); 1578 if (rc) { 1579 DP_INFO(cdev, "Failed to establish LL2 connection\n"); 1580 goto release_fail; 1581 } 1582 1583 /* Post all Rx buffers to FW */ 1584 spin_lock_bh(&cdev->ll2->lock); 1585 list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) { 1586 rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), 1587 cdev->ll2->handle, 1588 buffer->phys_addr, 0, buffer, 1); 1589 if (rc) { 1590 DP_INFO(cdev, 1591 "Failed to post an Rx buffer; Deleting it\n"); 1592 dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, 1593 cdev->ll2->rx_size, DMA_FROM_DEVICE); 1594 kfree(buffer->data); 1595 list_del(&buffer->list); 1596 kfree(buffer); 1597 } else { 1598 cdev->ll2->rx_cnt++; 1599 } 1600 } 1601 spin_unlock_bh(&cdev->ll2->lock); 1602 1603 if (!cdev->ll2->rx_cnt) { 1604 DP_INFO(cdev, "Failed passing even a single Rx buffer\n"); 1605 goto release_terminate; 1606 } 1607 1608 if (!is_valid_ether_addr(params->ll2_mac_address)) { 1609 DP_INFO(cdev, "Invalid Ethernet address\n"); 1610 goto release_terminate; 1611 } 1612 1613 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 1614 if (!p_ptt) { 1615 DP_INFO(cdev, "Failed to acquire PTT\n"); 1616 goto release_terminate; 1617 } 1618 1619 rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 1620 params->ll2_mac_address); 1621 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 1622 if (rc) { 1623 DP_ERR(cdev, "Failed to allocate LLH filter\n"); 1624 goto release_terminate_all; 1625 } 1626 1627 ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); 1628 1629 return 0; 1630 1631 release_terminate_all: 1632 1633 release_terminate: 1634 qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 1635 release_fail: 1636 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 1637 fail: 1638 qed_ll2_kill_buffers(cdev); 1639 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 1640 return -EINVAL; 1641 } 1642 1643 static int qed_ll2_stop(struct qed_dev *cdev) 1644 { 1645 struct qed_ptt *p_ptt; 1646 int rc; 1647 1648 if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) 1649 return 0; 1650 1651 p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); 1652 if (!p_ptt) { 1653 DP_INFO(cdev, "Failed to acquire PTT\n"); 1654 goto fail; 1655 } 1656 1657 qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, 1658 cdev->ll2_mac_address); 1659 qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); 1660 eth_zero_addr(cdev->ll2_mac_address); 1661 1662 rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), 1663 cdev->ll2->handle); 1664 if (rc) 1665 DP_INFO(cdev, "Failed to terminate LL2 connection\n"); 1666 1667 qed_ll2_kill_buffers(cdev); 1668 1669 qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); 1670 cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; 1671 1672 return rc; 1673 fail: 1674 return -EINVAL; 1675 } 1676 1677 static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb) 1678 { 1679 const skb_frag_t *frag; 1680 int rc = -EINVAL, i; 1681 dma_addr_t mapping; 1682 u16 vlan = 0; 1683 u8 flags = 0; 1684 1685 if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { 1686 DP_INFO(cdev, "Cannot transmit a checksumed packet\n"); 1687 return -EINVAL; 1688 } 1689 1690 if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) { 1691 DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", 1692 1 + skb_shinfo(skb)->nr_frags); 1693 return -EINVAL; 1694 } 1695 1696 mapping = dma_map_single(&cdev->pdev->dev, skb->data, 1697 skb->len, DMA_TO_DEVICE); 1698 if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { 1699 DP_NOTICE(cdev, "SKB mapping failed\n"); 1700 return -EINVAL; 1701 } 1702 1703 /* Request HW to calculate IP csum */ 1704 if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && 1705 ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) 1706 flags |= BIT(CORE_TX_BD_FLAGS_IP_CSUM_SHIFT); 1707 1708 if (skb_vlan_tag_present(skb)) { 1709 vlan = skb_vlan_tag_get(skb); 1710 flags |= BIT(CORE_TX_BD_FLAGS_VLAN_INSERTION_SHIFT); 1711 } 1712 1713 rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev), 1714 cdev->ll2->handle, 1715 1 + skb_shinfo(skb)->nr_frags, 1716 vlan, flags, 0, 0 /* RoCE FLAVOR */, 1717 mapping, skb->len, skb, 1); 1718 if (rc) 1719 goto err; 1720 1721 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 1722 frag = &skb_shinfo(skb)->frags[i]; 1723 if (!cdev->ll2->frags_mapped) { 1724 mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, 1725 skb_frag_size(frag), 1726 DMA_TO_DEVICE); 1727 1728 if (unlikely(dma_mapping_error(&cdev->pdev->dev, 1729 mapping))) { 1730 DP_NOTICE(cdev, 1731 "Unable to map frag - dropping packet\n"); 1732 goto err; 1733 } 1734 } else { 1735 mapping = page_to_phys(skb_frag_page(frag)) | 1736 frag->page_offset; 1737 } 1738 1739 rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev), 1740 cdev->ll2->handle, 1741 mapping, 1742 skb_frag_size(frag)); 1743 1744 /* if failed not much to do here, partial packet has been posted 1745 * we can't free memory, will need to wait for completion. 1746 */ 1747 if (rc) 1748 goto err2; 1749 } 1750 1751 return 0; 1752 1753 err: 1754 dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); 1755 1756 err2: 1757 return rc; 1758 } 1759 1760 static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) 1761 { 1762 if (!cdev->ll2) 1763 return -EINVAL; 1764 1765 return qed_ll2_get_stats(QED_LEADING_HWFN(cdev), 1766 cdev->ll2->handle, stats); 1767 } 1768 1769 const struct qed_ll2_ops qed_ll2_ops_pass = { 1770 .start = &qed_ll2_start, 1771 .stop = &qed_ll2_stop, 1772 .start_xmit = &qed_ll2_start_xmit, 1773 .register_cb_ops = &qed_ll2_register_cb_ops, 1774 .get_stats = &qed_ll2_stats, 1775 }; 1776 1777 int qed_ll2_alloc_if(struct qed_dev *cdev) 1778 { 1779 cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); 1780 return cdev->ll2 ? 0 : -ENOMEM; 1781 } 1782 1783 void qed_ll2_dealloc_if(struct qed_dev *cdev) 1784 { 1785 kfree(cdev->ll2); 1786 cdev->ll2 = NULL; 1787 } 1788